PORTAGE BIOCHEMISTRY MODULE 1
EXAM QUESTIONS AND ANSWERS
LATEST EDITION (100% VERIFIED)
Definition |of |biochemistry |- |ANS |-chemistry |of |life; |how |properties |of |organisms |relate |to |their
|molecules
What |are |the |3 |things |biochemists |study? |- |ANS |-1. |The |relationship |between |structure |and |
function |of |biomolecules
2. |Chemical |reactions |of |organisms |(metabolism)
3. |Communication |within |and |among |organisms
What |are |bulk |elements? |- |ANS |-Elements |that |are |abundant |in |living |organisms
What |are |trace |elements? |- |ANS |-Elements |that |are |less |abundant |in |organisms |but |still |crucial
|for |life
Name |the |bulk |elements |(10) |- |ANS |-H, |Na, |K, |Ca, |C, |N, |O, |P, |S, |Cl
Name |the |trace |elements |(13) |- |ANS |-Mg, |V, |Cr, |Mn, |Fe, |Co, |Ni, |Cu, |Zn, |Mo, |W, |Se, |I
What's |another |word |for |a |firefly? |- |ANS |-Lightning |bug
Explain |the |chemical |reaction |of |lightning |bugs |- |ANS |-The |chemical |reaction |is |called |
bioluminescence. |Proteins |regulate, |produce, |and |degrade |the |light-emitting |compound |called |
, luciferin. |Luciferin, |when |acted |upon |by |a |protein, |glows |as |bugs |move. |This |chemical |reaction
|is |regulated |by |the |protein |(enzyme) |called |luciferase.
How |many |naturally |occurring |elements |exist? |How |many |are |found |in |living |organisms |and |
what |kind |of |elements? |- |ANS |-90 |naturally |occurring |elements, |less |than |30 |elements |are |
found |in |living |organisms. |
Most |of |these |30 |elements |are |smaller |non-metals.
Why |are |smaller |elements |favored |for |living |organisms? |- |ANS |-They |can |form |stable, |covalent |
bonds
How |are |strong |bonds |formed? |- |ANS |-Strong |bonds |form |by |significant |overlap |of |atoms, |
such |as |carbon |and |hydrogen, |permitting |them |to |share |electrons
Why |is |the |strong |bond |good |for |living |organisms? |- |ANS |-The |bond |that |forms |requires |
significant |energy |to |break |it. |This |means |the |bonds |can |withstand |mechanical |and |thermal |
pressures |through |the |growth |of |hair/skin |for |protection.
Do |larger |elements |form |stable |covalent |bonds? |- |ANS |-No
Describe |the |role |of |Iron |as |a |larger |element |- |ANS |-Iron |has |a |critical |role |in |hemoglobin |for |
oxygen |transport |in |vertebrates. |
Forms |an |ion |capable |of |binding |to |oxygen.
Describe |H |and |O |in |H2O |- |ANS |-Both |H |and |O |are |found |in |large |amounts. |They |are |small |
atoms |that |form |strong |bonds. |When |bonded |as |H2O, |they |form |a |small, |polar |molecule |that |
solvates |and |dissolves |many |compounds.
H2O |makes |up |___% |or |more |of |living |things |- |ANS |-70%
EXAM QUESTIONS AND ANSWERS
LATEST EDITION (100% VERIFIED)
Definition |of |biochemistry |- |ANS |-chemistry |of |life; |how |properties |of |organisms |relate |to |their
|molecules
What |are |the |3 |things |biochemists |study? |- |ANS |-1. |The |relationship |between |structure |and |
function |of |biomolecules
2. |Chemical |reactions |of |organisms |(metabolism)
3. |Communication |within |and |among |organisms
What |are |bulk |elements? |- |ANS |-Elements |that |are |abundant |in |living |organisms
What |are |trace |elements? |- |ANS |-Elements |that |are |less |abundant |in |organisms |but |still |crucial
|for |life
Name |the |bulk |elements |(10) |- |ANS |-H, |Na, |K, |Ca, |C, |N, |O, |P, |S, |Cl
Name |the |trace |elements |(13) |- |ANS |-Mg, |V, |Cr, |Mn, |Fe, |Co, |Ni, |Cu, |Zn, |Mo, |W, |Se, |I
What's |another |word |for |a |firefly? |- |ANS |-Lightning |bug
Explain |the |chemical |reaction |of |lightning |bugs |- |ANS |-The |chemical |reaction |is |called |
bioluminescence. |Proteins |regulate, |produce, |and |degrade |the |light-emitting |compound |called |
, luciferin. |Luciferin, |when |acted |upon |by |a |protein, |glows |as |bugs |move. |This |chemical |reaction
|is |regulated |by |the |protein |(enzyme) |called |luciferase.
How |many |naturally |occurring |elements |exist? |How |many |are |found |in |living |organisms |and |
what |kind |of |elements? |- |ANS |-90 |naturally |occurring |elements, |less |than |30 |elements |are |
found |in |living |organisms. |
Most |of |these |30 |elements |are |smaller |non-metals.
Why |are |smaller |elements |favored |for |living |organisms? |- |ANS |-They |can |form |stable, |covalent |
bonds
How |are |strong |bonds |formed? |- |ANS |-Strong |bonds |form |by |significant |overlap |of |atoms, |
such |as |carbon |and |hydrogen, |permitting |them |to |share |electrons
Why |is |the |strong |bond |good |for |living |organisms? |- |ANS |-The |bond |that |forms |requires |
significant |energy |to |break |it. |This |means |the |bonds |can |withstand |mechanical |and |thermal |
pressures |through |the |growth |of |hair/skin |for |protection.
Do |larger |elements |form |stable |covalent |bonds? |- |ANS |-No
Describe |the |role |of |Iron |as |a |larger |element |- |ANS |-Iron |has |a |critical |role |in |hemoglobin |for |
oxygen |transport |in |vertebrates. |
Forms |an |ion |capable |of |binding |to |oxygen.
Describe |H |and |O |in |H2O |- |ANS |-Both |H |and |O |are |found |in |large |amounts. |They |are |small |
atoms |that |form |strong |bonds. |When |bonded |as |H2O, |they |form |a |small, |polar |molecule |that |
solvates |and |dissolves |many |compounds.
H2O |makes |up |___% |or |more |of |living |things |- |ANS |-70%
